708609 has 16 divisors (see below), whose sum is σ = 1045440. Its totient is φ = 423360.

The previous prime is 708601. The next prime is 708641. The reversal of 708609 is 906807.

It is a happy number.

It is not a de Polignac number, because 708609 - 2³ = 708601 is a prime.

It is a Curzon number.

708609 is a lucky number.

It is a nialpdrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (708601) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3499 + ... + 3695.

It is an arithmetic number, because the mean of its divisors is an integer number (65340).

It is a Proth number, since it is equal to 173 ⋅ 2¹² + 1 and 173 < 2¹².

2⁷⁰⁸⁶⁰⁹ is an apocalyptic number.

It is an amenable number.

708609 is a deficient number, since it is larger than the sum of its proper divisors (336831).

708609 is a wasteful number, since it uses less digits than its factorization.

708609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320.

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 708609 is about 841.7891660030. The cubic root of 708609 is about 89.1529164267.

The spelling of 708609 in words is "seven hundred eight thousand, six hundred nine".